#region Copyright (C) 2005 - 2008 Giacomo Stelluti Scala
//
// Command Line Library: StringEnumeratorEx.cs
//
// Author:
//   Giacomo Stelluti Scala (giacomo.stelluti@gmail.com)
//
// Copyright (C) 2005 - 2008 Giacomo Stelluti Scala
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#endregion

namespace SMS.CommandLine
{
        using System;

        internal sealed class StringEnumeratorEx : IStringEnumerator
        {
                private string[] data;
                private int index;
                private int endIndex;

                public StringEnumeratorEx(string[] value)
                {
                        Validator.CheckIsNull(value, "value");

                        this.data = value;
                        this.index = -1;
                        this.endIndex = value.Length;
                }

                public string Current
                {
                        get
                        {
                                if (this.index == -1)
                                {
                                        throw new InvalidOperationException();
                                }
                                if (this.index >= this.endIndex)
                                {
                                        throw new InvalidOperationException();
                                }
                                return this.data[this.index];
                        }
                }

                public string Next
                {
                        get
                        {
                                if (this.index == -1)
                                {
                                        throw new InvalidOperationException();
                                }
                                if (this.index > this.endIndex)
                                {
                                        throw new InvalidOperationException();
                                }
                                if (this.IsLast)
                                {
                                        return null;
                                }
                                return this.data[this.index + 1];
                        }
                }

                public bool IsLast
                {
                        get { return this.index == this.endIndex - 1; }
                }

                public void Reset()
                {
                        this.index = -1;
                }

                public bool MoveNext()
                {
                        if (this.index < this.endIndex)
                        {
                                this.index++;
                                return this.index < this.endIndex;
                        }
                        return false;
                }

                public string GetRemainingFromNext()
                {
                        throw new NotImplementedException();
                }
        }
}
